<template>
  <div class="app-container">
    <el-form :inline="true">
      <el-form-item label="菜单名称">
        <el-input
          v-model="queryParams.menu_name"
          placeholder="请输入菜单名称"
          clearable
          size="small"
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="状态">
        <el-select v-model="queryParams.is_visible" placeholder="菜单状态" clearable size="small">
          <el-option
            v-for="dict in visibleOptions"
            :key="parseInt(dict.dict_value)"
            :label="dict.dict_label"
            :value="parseInt(dict.dict_value)"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button type="primary" icon="el-icon-plus" size="mini" @click="handleAdd" v-has-permission="['admin.menus.store']">新增
        </el-button>
      </el-form-item>
    </el-form>

    <el-table
      v-loading="loading"
      :data="menuList"
      row-key="menu_id"
      :tree-props="{children: 'children', hasChildren: 'hasChildren'}"
    >
      <el-table-column prop="menu_name" label="菜单名称" :show-overflow-tooltip="true"/>
      <el-table-column prop="icon" label="图标" align="center">
        <template slot-scope="scope" v-if="scope.row.icon">
          <svg-icon :icon-class="scope.row.icon"/>
        </template>
      </el-table-column>
      <el-table-column prop="order" label="排序" width="60"/>
      <el-table-column prop="permission" label="权限标识" :show-overflow-tooltip="true" width="240"/>
      <el-table-column prop="component" label="组件路径" :show-overflow-tooltip="true" width="240"/>
      <el-table-column prop="is_visible" label="可见" :formatter="is_visibleFormat" width="60"/>
      <el-table-column label="创建时间" align="center" prop="created_at" width="160"/>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width" width="240">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="primary"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-has-permission="['admin.menus.update']"
          >修改
          </el-button>
          <el-button
            v-if="scope.row.menu_type === 1"
            size="mini"
            type="primary"
            icon="el-icon-plus"
            @click="handleAdd(scope.row)"
            v-has-permission="['admin.menus.store']"
          >新增
          </el-button>
          <el-button
            size="mini"
            type="danger"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-has-permission="['admin.menus.destroy']"
          >删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加或修改菜单对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="600px">
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-row>
          <el-col :span="24">
            <el-form-item label="上级菜单">
              <tree-select
                v-model="form.parent_id"
                :options="menuOptions"
                :normalizer="normalizer"
                :show-count="true"
                placeholder="选择上级菜单"
              />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="菜单类型" prop="menu_type">
              <el-radio-group v-model="form.menu_type">
                <el-radio :label="1">菜单</el-radio>
                <el-radio :label="2">按钮</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item v-if="form.menu_type == 1" label="菜单图标">
              <el-popover
                placement="bottom-start"
                width="460"
                trigger="click"
                @show="$refs['iconSelect'].reset()"
              >
                <IconSelect ref="iconSelect" @selected="selected"/>
                <el-input slot="reference" v-model="form.icon" placeholder="点击选择图标" readonly>
                  <svg-icon
                    v-if="form.icon"
                    slot="prefix"
                    :icon-class="form.icon"
                    class="el-input__icon"
                    style="height: 32px;width: 16px;"
                  />
                  <i v-else slot="prefix" class="el-icon-search el-input__icon"/>
                </el-input>
              </el-popover>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="菜单名称" prop="menu_name">
              <el-input v-model="form.menu_name" placeholder="请输入菜单名称"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="显示排序" prop="order">
              <el-input-number v-model="form.order" controls-position="right" :min="0"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item v-if="form.menu_type === 1" label="是否外链">
              <el-radio-group v-model="form.is_link">
                <el-radio :label=1>是</el-radio>
                <el-radio :label=0>否</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item v-if="form.menu_type === 1" label="路由地址" prop="path">
              <el-input v-model="form.path" placeholder="请输入路由地址"/>
            </el-form-item>
          </el-col>
          <el-col v-if="form.menu_type === 1" :span="12">
            <el-form-item label="组件路径" prop="component">
              <el-input v-model="form.component" placeholder="请输入组件路径"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item v-if="form.menu_type" label="权限标识">
              <el-input v-model="form.permission" placeholder="请权限标识" maxlength="50"/>
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item v-if="form.menu_type === 1" label="菜单状态">
              <el-radio-group v-model="form.is_visible">
                <el-radio
                  v-for="dict in visibleOptions"
                  :key="parseInt(dict.dict_value)"
                  :label="parseInt(dict.dict_value)"
                >{{ dict.dict_label }}
                </el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listMenu, getMenu, delMenu, addMenu, updateMenu } from '@/api/system/menu'
import TreeSelect from '@riophae/vue-treeselect'
import '@riophae/vue-treeselect/dist/vue-treeselect.css'
import IconSelect from '@/components/IconSelect'

export default {
  name: 'Menu',
  components: { TreeSelect, IconSelect },
  data() {
    return {
      // 遮罩层
      loading: true,
      // 原始菜单数据
      originalMenuList: [],
      // 菜单表格树数据
      menuList: [],
      // 菜单树选项
      menuOptions: [],
      // 弹出层标题
      title: '',
      // 是否显示弹出层
      open: false,
      // 菜单状态数据字典
      visibleOptions: [],
      // 查询参数
      queryParams: {
        menu_name: undefined,
        is_visible: undefined
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        parent_id: [
          { required: true, message: '请选择上级菜单', trigger: 'blur' }
        ],
        menu_name: [
          { required: true, message: '菜单名称不能为空', trigger: 'blur' }
        ],
        menu_type: [
          { required: true, message: '请选择菜单类型', trigger: 'blur' }
        ],
        order: [
          { required: true, message: '菜单顺序不能为空', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getList()
    this.getDictData('system_menu_show').then(response => {
      this.visibleOptions = response.data
    })
  },
  methods: {
    // 选择图标
    selected(name) {
      this.form.icon = name
    },
    /** 查询菜单列表 */
    getList() {
      this.loading = true
      listMenu(this.queryParams).then(response => {
        this.originalMenuList = response.data
        this.menuList = response.data
        this.loading = false
      })
    },
    /** 转换菜单数据结构 */
    normalizer(node) {
      if (node.children && !node.children.length) {
        delete node.children
      }
      return {
        id: node.menu_id,
        label: node.menu_name,
        children: node.children
      }
    },
    /** 查询菜单下拉树结构 */
    getTreeSelect() {
      this.menuOptions = []
      const menu = { menu_id: 0, menu_name: '主菜单', children: [] }
      menu.children = this.handleMenuTree(this.originalMenuList, 'menu_id', 'parent_id')
      this.menuOptions.push(menu)
    },
    // 菜单显示状态字典翻译
    is_visibleFormat(row, column) {
      if (row.menu_type === 2) {
        return ''
      }
      return this.selectDictLabel(this.visibleOptions, row.is_visible)
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        menu_id: undefined,
        parent_id: 0,
        menu_name: undefined,
        icon: undefined,
        menu_type: 1,
        order: 0,
        is_link: 0,
        is_visible: 1
      }
      this.resetForm('form')
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList()
    },
    /** 新增按钮操作 */
    handleAdd(row) {
      this.reset()
      this.getTreeSelect()
      if (row != null) {
        this.form.parent_id = row.menu_id
      }
      this.open = true
      this.title = '添加菜单'
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      this.getTreeSelect()
      getMenu(row.menu_id).then(response => {
        this.form = response.data
        console.log(response)
        this.open = true
        this.title = '修改菜单'
      })
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs['form'].validate(valid => {
        if (valid) {
          if (this.form.menu_id !== undefined) {
            updateMenu(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess('修改成功')
                this.open = false
                this.getList()
              }
            })
          } else {
            addMenu(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess('新增成功')
                this.open = false
                this.getList()
              }
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      this.$confirm('是否确认删除名称为"' + row.menu_name + '"的数据项?', '警告', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(function() {
        return delMenu(row.menu_id)
      }).then(() => {
        this.getList()
        this.msgSuccess('删除成功')
      }).catch(function() {
      })
    },
    handleMenuTree(data, id, parentId, children, rootId) {
      id = id || 'id'
      parentId = parentId || 'parentId'
      children = children || 'children'
      rootId = rootId || 0
      // 对源数据深度克隆
      const cloneData = JSON.parse(JSON.stringify(data))
      // 循环所有项
      const treeData = cloneData.filter(father => {
        const branchArr = cloneData.filter(child => {
          if (child['menu_type'] === 1) {
            // 返回每一项的子级数组
            return father[id] === child[parentId]
          }
        })
        branchArr.length > 0 ? father.children = branchArr : ''
        // 返回第一层
        return father[parentId] === rootId
      })
      return treeData !== '' ? treeData : data
    }
  }
}

</script>
